--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <errno.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <string.h>
+#include <stdarg.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/queue.h>
+#include <sys/file.h>
+#include <unistd.h>
+#include <limits.h>
+#include <errno.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
+
+#include <rte_log.h>
+#include <rte_memory.h>
+#include <rte_memzone.h>
+#include <rte_launch.h>
+#include <rte_eal.h>
+#include <rte_eal_memconfig.h>
+#include <rte_per_lcore.h>
+#include <rte_lcore.h>
+#include <rte_common.h>
+#include <rte_string_fns.h>
+
+#include "eal_private.h"
+#include "eal_internal_cfg.h"
+#include "eal_filesystem.h"
+#include <exec-env/rte_dom0_common.h>
+
+#define PAGE_SIZE RTE_PGSIZE_4K
+#define DEFAUL_DOM0_NAME "dom0-mem"
+
+static int xen_fd = -1;
+static const char sys_dir_path[] = "/sys/kernel/mm/dom0-mm/memsize-mB";
+
+/*
+ * Try to mmap *size bytes in /dev/zero. If it is successful, return the
+ * pointer to the mmap'd area and keep *size unmodified. Else, retry
+ * with a smaller zone: decrease *size by mem_size until it reaches
+ * 0. In this case, return NULL. Note: this function returns an address
+ * which is a multiple of mem_size size.
+ */
+static void *
+xen_get_virtual_area(size_t *size, size_t mem_size)
+{
+ void *addr;
+ int fd;
+ long aligned_addr;
+
+ RTE_LOG(DEBUG, EAL, "Ask a virtual area of 0x%zu bytes\n", *size);
+
+ fd = open("/dev/zero", O_RDONLY);
+ if (fd < 0){
+ RTE_LOG(ERR, EAL, "Cannot open /dev/zero\n");
+ return NULL;
+ }
+ do {
+ addr = mmap(NULL, (*size) + mem_size, PROT_READ,
+ MAP_PRIVATE, fd, 0);
+ if (addr == MAP_FAILED)
+ *size -= mem_size;
+ } while (addr == MAP_FAILED && *size > 0);
+
+ if (addr == MAP_FAILED) {
+ close(fd);
+ RTE_LOG(ERR, EAL, "Cannot get a virtual area\n");
+ return NULL;
+ }
+
+ munmap(addr, (*size) + mem_size);
+ close(fd);
+
+ /* align addr to a mem_size boundary */
+ aligned_addr = (uintptr_t)addr;
+ aligned_addr = RTE_ALIGN_CEIL(aligned_addr, mem_size);
+ addr = (void *)(aligned_addr);
+
+ RTE_LOG(DEBUG, EAL, "Virtual area found at %p (size = 0x%zx)\n",
+ addr, *size);
+
+ return addr;
+}
+
+/**
+ * Get memory size configuration from /sys/devices/virtual/misc/dom0_mm
+ * /memsize-mB/memsize file, and the size unit is mB.
+ */
+static int
+get_xen_memory_size(void)
+{
+ char path[PATH_MAX];
+ unsigned long mem_size = 0;
+ static const char *file_name;
+
+ file_name = "memsize";
+ snprintf(path, sizeof(path), "%s/%s",
+ sys_dir_path, file_name);
+
+ if (eal_parse_sysfs_value(path, &mem_size) < 0)
+ return -1;
+
+ if (mem_size == 0)
+ rte_exit(EXIT_FAILURE,"XEN-DOM0:the %s/%s was not"
+ " configured.\n",sys_dir_path, file_name);
+ if (mem_size % 2)
+ rte_exit(EXIT_FAILURE,"XEN-DOM0:the %s/%s must be"
+ " even number.\n",sys_dir_path, file_name);
+
+ if (mem_size > DOM0_CONFIG_MEMSIZE)
+ rte_exit(EXIT_FAILURE,"XEN-DOM0:the %s/%s should not be larger"
+ " than %d mB\n",sys_dir_path, file_name, DOM0_CONFIG_MEMSIZE);
+
+ return mem_size;
+}
+
+/**
+ * Based on physical address to caculate MFN in Xen Dom0.
+ */
+phys_addr_t
+rte_xen_mem_phy2mch(uint32_t memseg_id, const phys_addr_t phy_addr)
+{
+ int mfn_id;
+ uint64_t mfn, mfn_offset;
+ struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
+ struct rte_memseg *memseg = mcfg->memseg;
+
+ mfn_id = (phy_addr - memseg[memseg_id].phys_addr) / RTE_PGSIZE_2M;
+
+ /*the MFN is contiguous in 2M */
+ mfn_offset = (phy_addr - memseg[memseg_id].phys_addr) %
+ RTE_PGSIZE_2M / PAGE_SIZE;
+ mfn = mfn_offset + memseg[memseg_id].mfn[mfn_id];
+
+ /** return mechine address */
+ return mfn * PAGE_SIZE + phy_addr % PAGE_SIZE;
+}
+
+int
+rte_xen_dom0_memory_init(void)
+{
+ void *vir_addr, *vma_addr = NULL;
+ int err, ret = 0;
+ uint32_t i, requested, mem_size, memseg_idx, num_memseg = 0;
+ size_t vma_len = 0;
+ struct memory_info meminfo;
+ struct memseg_info seginfo[RTE_MAX_MEMSEG];
+ int flags, page_size = getpagesize();
+ struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
+ struct rte_memseg *memseg = mcfg->memseg;
+ uint64_t total_mem = internal_config.memory;
+
+ memset(seginfo, 0, sizeof(seginfo));
+ memset(&meminfo, 0, sizeof(struct memory_info));
+
+ mem_size = get_xen_memory_size();
+ requested = (unsigned) (total_mem / 0x100000);
+ if (requested > mem_size)
+ /* if we didn't satisfy total memory requirements */
+ rte_exit(EXIT_FAILURE,"Not enough memory available! Requested: %uMB,"
+ " available: %uMB\n", requested, mem_size);
+ else if (total_mem != 0)
+ mem_size = requested;
+
+ /* Check FD and open once */
+ if (xen_fd < 0) {
+ xen_fd = open(DOM0_MM_DEV, O_RDWR);
+ if (xen_fd < 0) {
+ RTE_LOG(ERR, EAL, "Can not open %s\n",DOM0_MM_DEV);
+ return -1;
+ }
+ }
+
+ meminfo.size = mem_size;
+
+ /* construct memory mangement name for Dom0 */
+ snprintf(meminfo.name, DOM0_NAME_MAX, "%s-%s",
+ internal_config.hugefile_prefix, DEFAUL_DOM0_NAME);
+
+ /* Notify kernel driver to allocate memory */
+ ret = ioctl(xen_fd, RTE_DOM0_IOCTL_PREPARE_MEMSEG, &meminfo);
+ if (ret < 0) {
+ RTE_LOG(ERR, EAL, "XEN DOM0:failed to get memory\n");
+ err = -EIO;
+ goto fail;
+ }
+
+ /* Get number of memory segment from driver */
+ ret = ioctl(xen_fd, RTE_DOM0_IOCTL_GET_NUM_MEMSEG, &num_memseg);
+ if (ret < 0) {
+ RTE_LOG(ERR, EAL, "XEN DOM0:failed to get memseg count.\n");
+ err = -EIO;
+ goto fail;
+ }
+
+ if(num_memseg > RTE_MAX_MEMSEG){
+ RTE_LOG(ERR, EAL, "XEN DOM0: the memseg count %d is greater"
+ " than max memseg %d.\n",num_memseg, RTE_MAX_MEMSEG);
+ err = -EIO;
+ goto fail;
+ }
+
+ /* get all memory segements information */
+ ret = ioctl(xen_fd, RTE_DOM0_IOCTL_GET_MEMSEG_INFO, seginfo);
+ if (ret < 0) {
+ RTE_LOG(ERR, EAL, "XEN DOM0:failed to get memseg info.\n");
+ err = -EIO;
+ goto fail;
+ }
+
+ /* map all memory segments to contiguous user space */
+ for (memseg_idx = 0; memseg_idx < num_memseg; memseg_idx++)
+ {
+ vma_len = seginfo[memseg_idx].size;
+
+ /**
+ * get the biggest virtual memory area up to vma_len. If it fails,
+ * vma_addr is NULL, so let the kernel provide the address.
+ */
+ vma_addr = xen_get_virtual_area(&vma_len, RTE_PGSIZE_2M);
+ if (vma_addr == NULL) {
+ flags = MAP_SHARED;
+ vma_len = RTE_PGSIZE_2M;
+ } else
+ flags = MAP_SHARED | MAP_FIXED;
+
+ seginfo[memseg_idx].size = vma_len;
+ vir_addr = mmap(vma_addr, seginfo[memseg_idx].size,
+ PROT_READ|PROT_WRITE, flags, xen_fd,
+ memseg_idx * page_size);
+ if (vir_addr == MAP_FAILED) {
+ RTE_LOG(ERR, EAL, "XEN DOM0:Could not mmap %s\n",
+ DOM0_MM_DEV);
+ err = -EIO;
+ goto fail;
+ }
+
+ memseg[memseg_idx].addr = vir_addr;
+ memseg[memseg_idx].phys_addr = page_size *
+ seginfo[memseg_idx].pfn ;
+ memseg[memseg_idx].len = seginfo[memseg_idx].size;
+ for ( i = 0; i < seginfo[memseg_idx].size / RTE_PGSIZE_2M; i++)
+ memseg[memseg_idx].mfn[i] = seginfo[memseg_idx].mfn[i];
+
+ /* MFNs are continuous in 2M, so assume that page size is 2M */
+ memseg[memseg_idx].hugepage_sz = RTE_PGSIZE_2M;
+
+ memseg[memseg_idx].nchannel = mcfg->nchannel;
+ memseg[memseg_idx].nrank = mcfg->nrank;
+
+ /* NUMA is not suppoted in Xen Dom0, so only set socket 0*/
+ memseg[memseg_idx].socket_id = 0;
+ }
+
+ return 0;
+fail:
+ if (xen_fd > 0) {
+ close(xen_fd);
+ xen_fd = -1;
+ }
+ return err;
+}
+
+/*
+ * This creates the memory mappings in the secondary process to match that of
+ * the server process. It goes through each memory segment in the DPDK runtime
+ * configuration, mapping them in order to form a contiguous block in the
+ * virtual memory space
+ */
+int
+rte_xen_dom0_memory_attach(void)
+{
+ const struct rte_mem_config *mcfg;
+ unsigned s = 0; /* s used to track the segment number */
+ int xen_fd = -1;
+ int ret = -1;
+ void *vir_addr;
+ char name[DOM0_NAME_MAX] = {0};
+ int page_size = getpagesize();
+
+ mcfg = rte_eal_get_configuration()->mem_config;
+
+ /* Check FD and open once */
+ if (xen_fd < 0) {
+ xen_fd = open(DOM0_MM_DEV, O_RDWR);
+ if (xen_fd < 0) {
+ RTE_LOG(ERR, EAL, "Can not open %s\n",DOM0_MM_DEV);
+ goto error;
+ }
+ }
+
+ /* construct memory mangement name for Dom0 */
+ snprintf(name, DOM0_NAME_MAX, "%s-%s",
+ internal_config.hugefile_prefix, DEFAUL_DOM0_NAME);
+ /* attach to memory segments of primary process */
+ ret = ioctl(xen_fd, RTE_DOM0_IOCTL_ATTACH_TO_MEMSEG, name);
+ if (ret) {
+ RTE_LOG(ERR, EAL,"attach memory segments fail.\n");
+ goto error;
+ }
+
+ /* map all segments into memory to make sure we get the addrs */
+ for (s = 0; s < RTE_MAX_MEMSEG; ++s) {
+
+ /*
+ * the first memory segment with len==0 is the one that
+ * follows the last valid segment.
+ */
+ if (mcfg->memseg[s].len == 0)
+ break;
+
+ vir_addr = mmap(mcfg->memseg[s].addr, mcfg->memseg[s].len,
+ PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, xen_fd,
+ s * page_size);
+ if (vir_addr == MAP_FAILED) {
+ RTE_LOG(ERR, EAL, "Could not mmap %llu bytes "
+ "in %s to requested address [%p]\n",
+ (unsigned long long)mcfg->memseg[s].len, DOM0_MM_DEV,
+ mcfg->memseg[s].addr);
+ goto error;
+ }
+ }
+ return 0;
+
+error:
+ if (xen_fd >= 0) {
+ close(xen_fd);
+ xen_fd = -1;
+ }
+ return -1;
+}
Code Review / deb_dpdk.git / blobdiff